What is the ClearRun receipt hash chain?
Each receipt stores the hash of the receipt before it in the same workspace, in prevHash. That links them into a chain, so a receipt can't be removed or changed without breaking every link after it.
Last updated
How it starts
The first receipt in a workspace points to a fixed starting value made from the workspace id.
Check it
- One receipt: the public lookup reports
chainIntact. - A whole workspace:
GET /api/verify/chain?workspaceId=.... See How to check a workspace's whole receipt chain (GET /api/verify/chain). - Offline: an audit export includes the chain.
What it does not mean
An intact chain shows the record is complete and in order. It says nothing about whether any answer is true.